JPH0518012U - Hygroscopic respirator - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In a moisture absorption respirator attached to a power transformer, an intake / exhaust separator is provided inside and the life of the moisture absorbent is extended by communicating with the atmosphere through a dry valve. .. [Structure] A main body 1 and an upper lid 2 are provided, and a separator 12 is provided in the main body 1 to divide into a suction flow path and an exhaust flow path, and a hygroscopic agent 4 contained in a container 3 is stored in the suction flow path. A dry-type valve 30, 40, which is normally closed after the exhaust flow path and is selectively opened with breathing, is provided, and an intake flow path and an exhaust flow path are separately provided, so that the hygroscopic agent is unnecessary. 4 is to prevent outside air and inside air from touching.
It is configured so that it can be swung by 4, 21, and 5 and can be tightly sealed, and the upper cover 2 can be removed to easily replace the hygroscopic agent 4 contained in the container 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hygroscopic respirator attached to a transformer or the like.

[0002]

[Prior Art]

 In electric power transformers, etc., electrical insulating oil is enclosed for the purpose of insulation and cooling. The enclosed electrical insulating oil expands and contracts in response to changes in the load of the transformer and changes in the outside air temperature, and the volume changes repeatedly, so that the air in the remaining space above the insulating oil expands accordingly. It contracts and breathes in and out with the outside air.

Since there is always some humidity in the atmosphere, although there is a difference depending on the season and the weather, the upper residual space is not in direct communication with the outside air, and dehumidification is performed via a hygroscopic respirator containing a hygroscopic agent. I was trying to breathe.

In a hygroscopic respirator, when the electrically insulating oil is in equilibrium and is not breathing, in other words, when the hygroscopic agent continuously contacts the atmosphere during apnea, the hygroscopic performance deteriorates. As shown in the figure, the electric insulating oil O is stored in the oil jar C, and the small pipe P1 for intake and the small pipe P2 for exhaust are reversely submerged therein, so that the first working and functioning can be performed in a few centimeters of respiratory pressure water column. An oil seal valve was used. In Fig. 7, the shaded area shows the rise and fall of the oil level. When the internal pressure of the equipment is low, the small pipe for intake P1 has a large diameter and the outside air is taken in from this, but the small pipe for exhaust P2 is Blocked (A). On the contrary, when the internal pressure increases, the small pipe P1 for intake is blocked, but is discharged from the small pipe P2 for exhaust (B).

[0005]

[Problems to be Solved by the Invention]

 In recent years, as the size of power transformers has increased, the amount of electrically insulating oil enclosed in the transformers has also increased, and the amount of breathing has also tended to increase accordingly. Therefore, a large amount of hygroscopic agent is used to complement and improve the hygroscopic performance.

However, as the breathing atmosphere passes by with breathing, the electrically insulating oil in the oil jar, that is, the separating liquid jumps up, and if the intake and exhaust exceed a limit, leakage to the outside or moisture absorption occurs. Not only did it suck into the agent and stain it, but depending on the amount, the tip of the small pipe buried in the oil jar was exposed and the function as an oil seal valve was lost. Therefore, as maintenance, it was indispensable to check and replenish the insulating oil in addition to replacing the hygroscopic agent.

[0007] Silica gel particles that can be dehumidified and reused by heating have been used as the hygroscopic agent contained in the respiratory organs. However, when reusing dehumidification, if the heating rate is too fast, the particles will break into fine particles and pass through the mesh inside the respiratory organ. Thus, due to the lack of personnel, the merit of reuse was weakened. On the contrary, it is not only difficult to replace the used hygroscopic agent, but it also takes a lot of time to clean up the dust accumulated inside the atomized particles. On the other hand, even if the silica gel particles as a hygroscopic agent were discarded as they were, there was no risk of causing pollution problems because they were originally the main components of the earth.

[0008]

[Means for Solving the Problems]

 The present invention has been made to solve such a problem of the prior art, so that it is not necessary to replenish the isolation liquid into the oil jar by the dry valve, and the hygroscopic agent can be easily replaced. The main point of this is to provide a power transformer in a main container that has an intake / exhaust isolation plate inside and is divided into an intake flow path and an exhaust flow path to store a moisture absorbent in a container in the intake flow path. , The upper lid configured to connect piping from equipment such as oil tanks is connected by a hinge so that it can be sealed and communicates with the atmosphere only during respiration, and only inhalation flow path during inhalation. It is characterized by the provision of a dry-type valve that opens the valve and releases only the exhaust flow path during exhaust.

[0009]

【Example】

 The contents of the present invention will be described below with reference to the embodiments shown in the drawings. The hygroscopic respirator according to the present invention comprises a main body 1 having a substantially cylindrical shape and an upper lid 2.

The main body 1 is provided with a bottom plate 11 having an exhaust port 11a and an intake port 11b, and a separator plate 12 is provided along the inner wall of the container 1 and connected to the exhaust port 11a to separate the intake and exhaust flow paths. I am doing it. Further, a locking edge 12a is provided along the inner circumference of the main body 1 following the separating plate 12. The locking edge 12a may be projected from the inner wall of the main body 1 and may be provided separately from the separator 12.

The moisture absorbent 4 contained in the container 3 is hooked and stored in the locking edge 12a. The container 3 comprises a resin molded product or a moisture-proof paper container. A flange 3a is provided around the upper end, a gasket 3b is attached to the lower surface of the flange 3a, and a large number of holes are formed on the upper and lower surfaces. The ventilation holes 3c are made of, and a sealing seal 3d that closes the ventilation holes 3c is attached during storage and is removed when used. Furthermore, a window hole 3e is provided on the side surface, and a transparent seal 3f is attached here.

As the hygroscopic agent 4, silica gel particles having a diameter of several millimeters are used, and a coloring treatment is performed on all or part of the hygroscopic agent to show that it has absorbed moisture. Specifically, it is colored light blue, and when it absorbs moisture, the colors are sequentially changed to green, pink, and white.

A viewing window 13 is provided on the body of the main body 1. The viewing window 13 has an opening 13a formed in the main body 1, a transparent plate 13c is brought into contact with the body 13 through a gasket 13b, and is tightened with a round bag nut 13d. Corresponding to the transparent seal 3f so that the color of the moisture absorbent 4 in the container 3 can be confirmed through the viewing window 13.

Hinge receivers 14 and 21 are provided on the upper portion of the side surface of the main body 1 and the upper lid 2, respectively, and both are connected by a pin 5 so that they can be opened and closed. The pin hole 14a has an oval shape so that the upper lid 2 can be moved slightly up and down.

As a detachable fastening means 6 for sealing the main body 1 and the upper lid 2, a single screw bolt 6c is rotatably connected to a mounting portion 6a protruding from the main body 1 with a pin 6b, and a wing nut 6d is screwed in. The wing nut receiver 6e is provided on the upper lid 2, and the wing nut 6d is manually tightened.

For sealing, a gasket groove 22 is provided in the upper lid 2 corresponding to the upper peripheral edge of the main body 1, a gasket 23 is put therein, and the single-screw bolt 6c is manually tightened for sealing.

A flange seat 24 for fixing a connection flange 71 of the pipe 7 from a device such as a transformer is provided in the center of the upper lid 2, and the connection flange 71 and the flange seat 24 are gasketed with a tightening bolt 8. The tightening body 1 is attached via 24a.

An annular projecting edge 25 that presses the flange portion 3 a of the container 3 is provided on the back surface of the upper lid 2, and the projecting edge 25 is provided with a cutout portion 25 a that continues to the exhaust passage.

Exhaust valve chamber 15 for shutting off the hygroscopic agent 5 from the atmosphere following the exhaust port 11a and the intake port 11b of the bottom plate 11 of the main body 1 and for allowing breathing operation with a slight pressure of several millimeters of water column. , The intake valve chambers 16 are independently provided.

The intake valve chamber 16 is provided with an intake port / valve seat 18 at its opening via a gasket 17a, and the intake valve 30 is attached to the valve seat 18 by a screwing method. Further, the intake valve chamber 16 is provided with a removable plug 19 for inspection and drainage of the intake valve chamber 16. In the illustrated example, the plug 19 is made of a screw.

In the illustrated example, the intake valve 30 is screwed through the intake port / valve seat 18, but the valve seat and the intake valve are integrally formed and screwed directly into the intake valve chamber 16. Can also be configured.

An exhaust valve 40 is attached to the opening of the exhaust valve chamber 15 by a screwing method, and a plug 19 is provided.

At the lower part of the main body 1, a protective cover 9 having an opening 91 downwardly provided in a mounting state is fixed by a mounting screw 92 for protecting the valve chambers 15 and 16 and for preventing rainwater from drip. There is.

Since the intake valve 30 and the exhaust valve 40 have the same structure and only the mounting directions are reversed, a description will be given based on simplified FIGS. 4 and 5. It consists of a thin-film valve integrally molded with fluorine-based resin or rubber or silicon-based rubber. It is integrated with the connecting member 33. It is lightly pressed against the valve seat in the normal state so that the hygroscopic agent 4 does not come into contact with the atmosphere during apnea and is consumed. Following the expansion and contraction, the operation is performed when the upper and lower pressures of the upper residual air become 1 to 2 cm of water column. FIG. 4 shows a closed state, and FIG. 5 shows a released state. When they are arranged in the same direction as shown in FIG. 1, when one is closed, the other is released. Therefore, when inhaling, the absorbed air is always supplied to the inside through the hygroscopic agent 4, but when inhaling, the intake valve 30 is closed and the hygroscopic agent itself has a resistance. The air from the inside is released almost without contacting the hygroscopic agent 4, and the hygroscopic agent 4 is not unnecessarily exposed to moisture.

FIG. 6 shows another embodiment of the valve 50. The main body 51 abutted against the valve seat and the mounting rod 52 are made to penetrate from the center of this main body 51. It is adapted to be inserted into the receiving seats 15a and 16a provided inside the valve seat so as to be stopped, and further covered with a cover plate 60 provided with an opening (not shown) as appropriate. The cover plate 60 protects the valve 50 so as not to impair its function, which allows the valve 50 to have a thin film shape. The basic structure of these valves 30, 40, 50 is widely adopted in kerosene pumps, dust masks, etc., and it can be said that the reliability of operation and long life have been proven.

[0026]

【The invention's effect】

 As described above, the hygroscopic respirator according to the present invention divides the intake flow path and the exhaust flow path into the main body, and is closed when the inside of the transformer is in equilibrium, that is, during apnea, and when expiring, one of them is closed. Since a dry type valve that only opens the valve is adopted, it is possible to avoid the occurrence of the loss of valve function that occurs during abnormal breathing that occurs with conventional wet type valves, maintenance is unnecessary, and only when inhaling Will pass through the moisture absorbent. Therefore, since the consumption of the hygroscopic agent inside is suppressed to a low level, it lasts for a long time, and the disadvantage of frequent replacement of the hygroscopic agent does not occur.

Furthermore, since a viewing window is provided on the main body and the consumption of the hygroscopic agent inside can be visually confirmed by color, it is possible to easily know the time of replacement, and for replacement, remove the hygroscopic agent contained in the container by removing the upper lid. The main body can be swung, the hygroscopic agent in the used container can be taken out, and a new one can be put in, making the work extremely easy.

The hygroscopic agent is preferably disposable, but may be reused after being taken out from the container after accumulating a predetermined amount.

In addition, since the dry type valve is adopted, it is possible to mount the respirator in the horizontal direction without being restricted by the mounting direction.

Although the embodiment has been described as a hygroscopic respirator for a transformer, it can be used not only as a hygroscopic respirator for a large tank of insulating oil.

[Submission date] February 25, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

In the hygroscopic respirator, when the electrically insulating oil is in equilibrium and is not breathing, in other words, when the hygroscopic agent is continuously in contact with the atmosphere during apnea, the hygroscopic performance is deteriorated. As shown in A), the electric insulating oil O is stored in the oil jar C, and the intake small pipe P1 and the exhaust small pipe P2 are reversely immersed therein, so that the operation and function can be performed for the first time with a few centimeters of respiratory pressure water column. The wet type oil seal valve was used. Here, the condition of S> P1 diameter> P2 diameter is satisfied. When the internal pressure of the device becomes low, the small pipe P1 for intake is exposed as shown in FIG. 7 (B), and outside air or bubbles are sucked in, but the small pipe P2 for exhaust remains oil-sealed. On the contrary, when the internal pressure becomes high, as shown in FIG. 7 (C), the small air pipe P2 becomes bubbles and the air inside is exhausted. On the other hand, the small air pipe P1 for intake is sealed with oil. Become.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

The hygroscopic agent is designed to be disposable, but when the container is made to have heat resistance, a predetermined amount of the hygroscopic agent-containing container whose hygroscopic property has been lost is dried together with the container. It may be reused after recovering its hygroscopic ability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hygroscopic respirator according to the present invention.

FIG. 2 is a partially cutaway plan view taken along the line AA of FIG.

FIG. 3 is a bottom view taken along the line BB of FIG.

FIG. 4 is a front view, a sectional view, and a rear view showing a closed state of a valve.

FIG. 5 is a cross-sectional view showing an open state of the valve.

FIG. 6 is a cross-sectional view showing another valve.

FIG. 7 is a schematic view showing an operating state of a conventional wet type valve. A is for inhalation and B is for exhalation.

[Explanation of sign]

 1 Main body 2 Upper lid 3 Container 4 Hygroscopic agent 6 Fastening means 7 Piping 8 Tightening bolt

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[Procedure amendment]

[Submission date] February 25, 1991

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hygroscopic respirator according to the present invention.

FIG. 2 is a partially cutaway plan view taken along the line AA of FIG.

FIG. 3 is a bottom view taken along the line BB of FIG.

FIG. 4 is a front view, a sectional view, and a rear view showing a closed state of a valve.

FIG. 5 is a cross-sectional view showing an open state of the valve.

FIG. 6 is a sectional view showing a valve of another embodiment.

FIG. 7 is a view showing a conventional wet type valve, in which A is for balanced apnea, B is for inhalation, and C is for exhalation.

[Explanation of reference numerals] 1 main body 2 upper lid 3 container 4 hygroscopic agent 6 fastening means 7 piping 8 tightening bolt

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (1)

[Scope of utility model registration request] 1. A main body which is provided with an intake / exhaust isolation plate inside and is divided into an intake flow path and an exhaust flow path to store a hygroscopic agent in a container in the intake flow path, from a device such as a power transformer or an oil tank. The upper lid configured to connect the pipes is connected by a hinge so as to seal, and each flow path is connected to the atmosphere only during breathing, only the suction flow path is released during inhalation, and the exhaust flow path is exhausted during exhaust. A hygroscopic respirator characterized by being provided with a dry valve that releases only the valve.